Synthesis, Characterization and Catalytic Dehydration of Glycerol to Acrolein Over Phosphotungstic Acid Supported Y-Zeolite Catalysts

Viswanadham, Balaga; Nekkala, Nagaraju; Rohitha, Chozhiyath Nappunni; Vishwanathan, Venkataraman; Chary, Komandur V. R.

doi:10.1007/s10562-017-2236-9

Cited by 29 publications

(12 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, the formation of heavy molecules by condensation and oligomerisation can increase if the pore sizes of a catalyst is small that it slows the diffusion of glycerol, acrolein, and side products (ethers, acetol, polyglycerols, glycerol formals, polyaromatics, etc.). [34,35] It was also found that the pore openings are severely blocked when a little amount of coke is formed. [36] This effect hinders the diffusion of reagents into the pores and products into the reaction volume, causing side reactions on the active acidic sites.…”

Section: Pore Sizementioning

confidence: 98%

“…Glycerol tends more to oligomerise with the formation of polyglycols at high initial concentrations. [34] Furthermore, it was detected that formation of cyclic compounds, consisting mostly of polyaromatics and generating via multi-step oligomerisation of acrolein, is also favourable when the concentration of glycerol in the feedstock is increased. [51] So, the availability of acid sites reduces as well as the selectivity to acrolein.…”

Section: Feedstock Compositionmentioning

confidence: 99%

See 1 more Smart Citation

Tuning of Selectivity for Sustainable Production of Acrolein from Glycerol

Belousov

2021

ChemistrySelect

View full text Add to dashboard Cite

The catalytic dehydration of glycerol into acrolein is a rapidly growing area of both scientific interest and technological importance. The main problem faced by researchers is enhancement of selectivity while maintaining the stability and activity of a catalyst. This minireview is centered on key approaches for tuning of selectivity: changing of physicochemical properties (type of acid sites, its amount, pore and channel size, and doping with noble metals) and selection of optimal reaction conditions (temperature, contact time, feedstock composition, co-feeding O 2 or air). This overview also proposes and discusses the use of metal-organic frameworks as novel catalysts to overcome the main challenges in the dehydration of glycerol.

show abstract

Section: Pore Sizementioning

confidence: 98%

Section: Feedstock Compositionmentioning

confidence: 99%

Tuning of Selectivity for Sustainable Production of Acrolein from Glycerol

Belousov

2021

ChemistrySelect

View full text Add to dashboard Cite

show abstract

“…Viswanadham et al generated a high amount of Brönsted acid sites into a Y-zeolite by incorporating 10–40 wt.% of H 3 PW 12 O 40 using a wetness impregnation method [ 79 ]. They attained the highest acrolein yield (79%) after 3 h of TOS at 275 °C for the catalyst with a 20 wt.% of H 3 PW 12 O 40 .…”

Section: Mesoporous Silica-based Catalysts Used In the Glycerol Dementioning

confidence: 99%

Porous Silicon-Based Catalysts for the Dehydration of Glycerol to High Value-Added Products

et al. 2018

View full text Add to dashboard Cite

Increasing worldwide biodiesel production has led to the generation of an important glycerol surplus, which needs to be valorized in order to improve the economic and environmental sustainability of the biodiesel industry. In this context, glycerol dehydration to acrolein by acid catalysis appears to be a potential route of glycerol valorization, since acrolein is an important intermediate for many chemical industries. The main drawback of this catalytic process is catalyst deactivation. Different alternatives have been proposed for overcoming it, such as the use of mesoporous materials in order to facilitate the diffusion of glycerol and reaction products, thus minimizing deactivation. This review compiles the main achievements of the use of mesoporous silica-containing materials that have been deployed either as a catalyst or for support in glycerol dehydration to acrolein. Thus, the effect of mesoporosity on both catalytic performance and deactivation will be discussed, as well as the blocking of pores by coke deposition.

show abstract

“…In the case of phosphotungstic acid (PTA) supported Y-zeolite the total acidity and pore size increased with a raise in loading up to 20 wt% and decreased beyond this limit. PTA/Y application showed a total conversion of 100% glycerol and 79% selectivity towards acrolein among all tested catalysts ( Viswanadham et al, 2018 ).…”

Section: Catalytic Processes With Transition Metals On Zeolitesmentioning

confidence: 99%

Recent Advances in Catalysis Based on Transition Metals Supported on Zeolites

et al. 2021

View full text Add to dashboard Cite

This article reviews the current state and development of thermal catalytic processes using transition metals (TM) supported on zeolites (TM/Z), as well as the contribution of theoretical studies to understand the details of the catalytic processes. Structural features inherent to zeolites, and their corresponding properties such as ion exchange capacity, stable and very regular microporosity, the ability to create additional mesoporosity, as well as the potential chemical modification of their properties by isomorphic substitution of tetrahedral atoms in the crystal framework, make them unique catalyst carriers. New methods that modify zeolites, including sequential ion exchange, multiple isomorphic substitution, and the creation of hierarchically porous structures both during synthesis and in subsequent stages of post-synthetic processing, continue to be discovered. TM/Z catalysts can be applied to new processes such as CO2 capture/conversion, methane activation/conversion, selective catalytic NOx reduction (SCR-deNOx), catalytic depolymerization, biomass conversion and H2 production/storage.

show abstract

Synthesis, Characterization and Catalytic Dehydration of Glycerol to Acrolein Over Phosphotungstic Acid Supported Y-Zeolite Catalysts

Cited by 29 publications

References 32 publications

Tuning of Selectivity for Sustainable Production of Acrolein from Glycerol

Tuning of Selectivity for Sustainable Production of Acrolein from Glycerol

Porous Silicon-Based Catalysts for the Dehydration of Glycerol to High Value-Added Products

Recent Advances in Catalysis Based on Transition Metals Supported on Zeolites

Contact Info

Product

Resources

About